dorsal/arxiv
View SchemaSecret parameters in quantum bit commitment
| Authors | Chi-Yee Cheung |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508180 |
| URL | https://arxiv.org/abs/quant-ph/0508180 |
Abstract
The no-go theorem of unconditionally secure quantum bit commitment depends crucially on the assumption that Alice knows in detail all the probability distributions generated by Bob. We show that if a protocol is concealing, then the cheating unitary transformation is independent of any parameters (including probability distributions) secretly chosen by Bob, so that Alice can calculate it without knowing Bob's secret choices. Otherwise the protocol cannot be concealing. Our result shows that the original impossibility proof was based on an incorrect assumption, despite the fact that its conclusion remains valid within the adopted framework. Furthermore, our result eliminates a potential loophole in the no-go theorem.
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"abstract": "The no-go theorem of unconditionally secure quantum bit commitment depends\ncrucially on the assumption that Alice knows in detail all the probability\ndistributions generated by Bob. We show that if a protocol is concealing, then\nthe cheating unitary transformation is independent of any parameters (including\nprobability distributions) secretly chosen by Bob, so that Alice can calculate\nit without knowing Bob\u0027s secret choices. Otherwise the protocol cannot be\nconcealing. Our result shows that the original impossibility proof was based on\nan incorrect assumption, despite the fact that its conclusion remains valid\nwithin the adopted framework. Furthermore, our result eliminates a potential\nloophole in the no-go theorem.",
"arxiv_id": "quant-ph/0508180",
"authors": [
"Chi-Yee Cheung"
],
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"quant-ph"
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"title": "Secret parameters in quantum bit commitment",
"url": "https://arxiv.org/abs/quant-ph/0508180"
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